TApplication Members

The following tables list the members exposed by TApplication.

	Name	Description
	FComponentStyle	FComponentStyle is the field of the ComponentStyle read-only property.

Protected Methods

	Name	Description
	_AddRef	Called when an application uses a component interface.
	_Release	Called when an application releases a component interface.
	AssignTo	Copies the properties of an object to a destination object.
	ChangeName	Sets the private, internal storage for the Name property to the string passed in NewName.
	DefineProperties	Designates methods for storing an object's unpublished data on a stream such as a form file.
	DefineProperties	Provides an interface for a method that reads and writes otherwise unpublished data.
	GetChildOwner	Returns the owner of a child component being read from a stream.
	GetChildParent	Returns the parent, or if there is no parent, returns the owner of a child component being read from a stream.
	GetChildren	Enumerates all child components.
	GetIDsOfNames	Maps a single member and an optional set of argument names to a corresponding set of integer dispatch identifiers (dispIDs).
	GetOwner	Returns the owner of a component.
	GetOwner	Returns the owner of an object.
	GetTypeInfo	Retrieves the type information for an object.
	GetTypeInfoCount	Returns the number of type information interfaces that an object provides (either 0 or 1).
	Idle	Processes messages in the Message queue for certain events.
	Invoke	Provides access to Automation properties and methods when the component wraps an Automation object.
	IsDlgMsg	Returns True if Msg is a dialog message, or False otherwise.
	IsHintMsg	Returns True if Msg is a hint message, or False otherwise.
	IsKeyMsg	Returns True if Msg is a key message, or False otherwise.
	IsMDIMsg	Returns True if Msg is a MDI message, or False otherwise.
	IsPreProcessMessage	Returns True if Msg is a preprocess message, or False otherwise.
	IsShortCut	Evaluates an input key combination to determine whether it is a shortcut.
	Loaded	Initializes the component after the form file has been read into memory.
	Notification	Forwards notification messages to all owned components.
	PaletteCreated	Responds when the component is created from the component palette.
	QueryInterface	Returns a reference to a specified interface if the object supports that interface.
	ReadState	Reads the state of the component.
	SetAncestor	Clears or sets csAncestor state in the component's ComponentState property.
	SetChildOrder	Sets the visual ordering of a child control.
	SetDesigning	Ensures that components inserted at design time have their design-mode flag set.
	SetDesignInstance	Ensures that components inserted at design time have their design-mode flag set.
	SetInline	Sets the csInline bit of the component's ComponentState property
	SetName	Sets the value of the Name property.
	SetParentComponent	Sets the parent component.
	Updated	Clears the csUpdating state in the component's ComponentState property when the component finishes updating.
	UpdateRegistry	Provides the interface for a method that adds type library and version information to the Registry on components that implement COM interfaces.
	Updating	Sets the csUpdating state in the component's ComponentState property.
	ValidateContainer	Determines whether an object can be inserted into a container.
	ValidateInsert	Provides the interface for a method that validates an child component before it is inserted.
	ValidateRename	Ensures that renaming an owned component does not create name conflict.
	WriteState	Writes the state of the component.

Public Events

	Name	Description
	OnActionExecute	Occurs when an action's Execute method is called and its action list has not already handled it.
	OnActionUpdate	Occurs when an action's Update method is called and its action list has not already handled it.
	OnActivate	Occurs when an application becomes active.
	OnDeactivate	Occurs when an application becomes inactive.
	OnException	Occurs when an unhandled exception occurs in the application.
	OnGetActiveFormHandle	OnGetActiveFormHandle is the event triggered when reading the value of the ActiveFormHandle property.
	OnGetMainFormHandle	OnGetMainFormHandle is the event triggered when reading the value of the MainFormHandle property.
	OnHelp	Occurs when the application receives a request for help.
	OnHint	Occurs when the mouse pointer moves over a control or menu item that can display a Help Hint.
	OnIdle	Occurs when an application becomes idle.
	OnMessage	Occurs when the application receives a Windows message.
	OnMinimize	Occurs when an application is minimized.
	OnModalBegin	Occurs when a modal form is opened.
	OnModalEnd	Occurs when a modal form is closed.
	OnRestore	Occurs when the previously minimized application is restored to its normal size.
	OnSettingChange	Occurs when Windows notifies the application that a system-wide setting has changed.
	OnShortCut	Occurs when the user presses a key (before the OnKeyDown event).
	OnShowHint	Occurs when the application is about to display the hint window for a Help Hint.

Public Methods

	Name	Description
	_AddRef	Increments the reference count for this interface.
	_Release	Decrements the reference count for this interface.
	ActivateHint	Displays a hint window for the control at a specified position.
	AddPopupForm	Adds a PopupForm to the current form.
	AfterConstruction	Responds after the last constructor has executed.
	Assign	Copies the contents of another, similar object.
	BeforeDestruction	Performs any necessary actions before the first destructor is called.
	BeforeDestruction	Responds before the first destructor executes.
	BringToFront	Sets the last active window as the topmost window on the desktop above all other applications.
	CancelHint	Cancels the display of a hint for a control.
	ClassInfo	Returns a pointer to the runtime type information (RTTI) table for the object type.
	ClassName	Returns a string indicating the type of the object instance (as opposed to the type of the variable passed as an argument).
	ClassNameIs	Determines whether an object is of a specific type.
	ClassParent	Returns the type of the immediate ancestor of a class.
	ClassType	Returns the class reference for the object's class.
	CleanupInstance	Performs finalization on long strings, variants, and interface variables within a class.
	ControlDestroyed	Notifies the application when a control is destroyed.
	Create	Creates a new application.
	CreateForm	Creates a new form.
	CreateHandle	Generates a main window for the application if it does not already have one.
	DefaultHandler	Provides the interface for a method that processes message records.
	Destroy	Destroys the application instance and all of its associated memory.
	DestroyComponents	Destroys all owned components.
	Destroying	Indicates that the component and its owned components are about to be destroyed.
	Dispatch	Calls message-handling methods for the object, based on the contents of the Message parameter.
	DoApplicationIdle	Processes messages in the Message queue for certain events.
	Equals	Checks if the current instance and the parameter are equal.
	ExecuteAction	Generates an OnActionExecute event.
	FieldAddress	This is the overview for the FieldAddress method overload.
	FindComponent	Indicates whether a given component is owned by the component.
	Free	Destroys an object and frees its associated memory, if necessary.
	FreeInstance	Deallocates memory allocated by a previous call to the System::TObject::NewInstance method.
	FreeNotification	Ensures that AComponent is notified that the component is going to be destroyed.
	FreeOnRelease	Frees the interface reference for components that were created from COM classes.
	GetComponent	Returns a reference to the component associated by the implementing class.
	GetEnumerator	Returns a TComponent enumerator.
	GetHashCode	Returns an integer containing the hash code.
	GetInterface	Retrieves a specified interface.
	GetInterfaceEntry	Returns the entry for a specific interface implemented in a class.
	GetInterfaceTable	Returns a pointer to a structure containing all of the interfaces implemented by a given class.
	GetNamePath	Returns a string used by the Object Inspector.
	GetNamePath	Returns the name of the object as it appears in the Object Inspector.
	GetParentComponent	Returns the containing Component.
	HandleException	Provides default handling of exceptions for the application.
	HandleMessage	Interrupts the execution of an application while Windows processes a message in the Windows message queue.
	HasParent	Verifies whether the component has a parent.
	HelpCommand	Provides quick access to any of the Help commands in the WinHelp API (application programming interface).
	HelpContext	Displays a specified help topic.
	HelpJump	Displays a specified help topic.
	HelpKeyword	Displays a specified help topic.
	HelpShowTableOfContents	Shows the Table of Contents within the help system.
	HideHint	Hides the current hint.
	HintMouseMessage	Regulates the display of hint windows.
	HookMainWindow	Enables a native Windows dialog box to receive messages sent to the application's main window.
	HookSynchronizeWakeup	Assigns a method to the WakeMainThread variable.
	InheritsFrom	Determines the relationship of two object types.
	Initialize	Provides an opportunity to initialize subsystems.
	InitInstance	Initializes a newly allocated object instance to all zeros and initializes the instance's virtual method table pointer.
	InsertComponent	Establishes the component as the owner of a specified component.
	InstanceSize	Returns the size in bytes of each instance of the object type.
	IsImplementorOf	Indicates whether the component implements a specified interface.
	IsRightToLeft	Specifies whether the application adjusts its interface for Middle Eastern locales.
	MessageBox	Displays a specified message to the user.
	MethodAddress	This is the overview for the MethodAddress method overload.
	MethodName	Returns the name of a class method by address.
	Minimize	Shrinks an application to the Windows task bar.
	ModalFinished	Track closing of modal form.
	ModalStarted	Track opening of modal form.
	NewInstance	Allocates memory for an instance of an object type and returns a pointer to that new instance.
	NormalizeAllTopMosts	Makes forms that have been designated as topmost forms (their FormStyle is fsStayOnTop) behave as if they were not topmost forms.
	NormalizeTopMosts	Makes forms that have been designated as topmost forms (their FormStyle is fsStayOnTop) behave as if they were not topmost forms.
	ProcessMessages	Interrupts the execution of an application so that it can process the message queue.
	QueryInterface	Returns a reference to a specified interface if the object supports that interface.
	ReferenceInterface	Establishes or removes internal links that cause this component to be notified when the implementer of a specified interface is destroyed.
	RemoveComponent	Removes a specified component specified from the component's Components list.
	RemoveFreeNotification	Disables destruction notification that was enabled by FreeNotification
	RemovePopupForm	Removes a PopupForm from the current form.
	Restore	Restores a minimized application to its normal size.
	RestoreTopMosts	Restores forms designated as fsStayOnTop to be topmost again.
	Run	Executes the application.
	SafeCallException	Handles exceptions in methods declared using the safecall calling convention.
	SafeCallException	Handles exceptions in methods declared using the safecall calling convention.
	SetSubComponent	Identifies whether the component is a subcomponent.
	ShowException	Displays a message box for exceptions that are not caught by application code.
	Terminate	Ends application execution.
	ToString	Returns a string containing the class name.
	UnhookMainWindow	Releases a dialog procedure previously hooked by a call to the HookMainWindow method.
	UnhookSynchronizeWakeup	Removes the method that was assigned to the WakeMainThread variable by HookSynchronizeWakeup.
	UnitName	Returns a string containing the unit name.
	UpdateAction	Generates an OnActionUpdate event.
	UseRightToLeftAlignment	Specifies whether the application object is in a right-to-left alignment mode.
	UseRightToLeftReading	Specifies whether the application object is in a right-to-left text mode.
	UseRightToLeftScrollBar	Specifies whether the vertical scroll bar appears on the left side controls.

Public Properties

	Name	Description
	ActionUpdateDelay	Delays the call to DoActionIdle.
	Active	Specifies whether the application is active and has focus.
	ActiveFormHandle	Gives the Windows handle of the currently active form.
	AllowTesting	Represents information for the IDE.
	AutoDragDocking	Indicates whether dragged windows are automatically docked.
	BiDiKeyboard	Specifies the name of the keyboard map that should be used in middle-east locales when text reads from right to left.
	BiDiMode	Indicates the layout of the application when running under Middle Eastern versions of Windows.
	ComObject	Specifies the interface reference implemented by the component.
	ComponentCount	Indicates the number of components owned by the component.
	ComponentIndex	Indicates the position of the component in its owner's Components property array.
	Components	Lists all components owned by the component.
	ComponentState	Describes the current state of the component, indicating when a component needs to avoid certain actions.
	ComponentStyle	Governs the behavior of the component.
	CurrentHelpFile	Indicates the current help file.
	DefaultFont	Specifies the default font used by the application.
	DesignInfo	Contains information used by the Form designer.
	DialogHandle	Provides a mechanism for using non-VCL dialog boxes in an application.
	EnumAllWindowsOnActivateHint	Is a Boolean variable used for hint displaying.
	ExeName	Contains the file name of the application's executable file including path information.
	Handle	Provides access to the window handle of the main form (window) of the application.
	HelpFile	Specifies the name of the default file the application uses to display Help.
	HelpSystem	Provides access to the interface for working with the help system.
	Hint	Specifies the text string that appears in the Help Hint box.
	HintColor	Determines the color of the hint boxes for the Help Hints for the application.
	HintHidePause	Specifies the time interval to wait before hiding the Help Hint if the mouse has not moved from the control or menu item.
	HintPause	Specifies the time interval that passes before the control's Help Hint appears when the user places the mouse pointer on a control or menu item.
	HintShortCuts	Specifies whether the application's pop-up hints include shortcut information.
	HintShortPause	Specifies the time period to wait before bringing up a hint if another hint has already been shown.
	Icon	Determines which icon represents the application on the Windows task bar.
	MainForm	Identifies which form in the application is the main window.
	MainFormHandle	Gives the Windows handle of the application main form.
	MainFormOnTaskBar	Controls how Windows taskbar buttons are handled by VCL.
	ModalLevel	Gives the number of currently open modal forms.
	ModalPopupMode	Controls how the modal form behaves, with respect to Windows' WS_POPUP style.
	NonBiDiKeyboard	Specifies the name of the keyboard map that should be used unless text reads from right to left.
	Owner	Indicates the component that is responsible for streaming and freeing this component.
	PopupControlWnd	Gives the handle to the popup control handler routine.
	ShowHint	Determines whether Help Hints are enabled or disabled for the entire application.
	ShowMainForm	Determines whether the application shows its main form on startup.
	Terminated	Reports whether the application is in the process of shutting down.
	Title	Contains the text that appears below the icon representing the application when it is minimized.
	UpdateFormatSettings	Specifies whether format settings are updated automatically when the user alters the system configuration.
	UpdateMetricSettings	Specifies whether the settings used for the hint window font and the icon title font are updated.
	VCLComObject	Represents information used internally by components that support COM.

Published Properties

	Name	Description
	Name	Specifies the name of the component as referenced in code.
	Tag	Stores an integer value as part of a component.

What do you think about this topic? Send feedback!